I believe I have successfully compiled Gimp 2.7.2 for Windows 7 64-bit. The caveats are mentioned on my homepage: http://www.partha.com . If there is interest, and people want to test it out, I will be happy to provide a zipfile with installation instructions on my website. If necessary, I can investigate creating an installation file. Also, let me know if there is any interest in the 32-bit as well and I will try to compile that as well. If there is interest, I can provide them on a regular basis.
Please reply here or leave me feedback on my site.